Fig. 11From: An ontology-based approach for developing a harmonised data-validation tool for European cancer registrationClass hierarchy inferred by the reasoner of three cancer cases of a single patient, in which an instance of a multiple-primary tumour is evident (CaseID$Y_1 and CaseID$Y_2). Lighter-coloured nodes depict primitive classes, and darker-coloured nodes depict defined classesBack to article page